Shock absorber



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Oct. 16,? 1923.V

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' fsnoei; Aissonisiin.

'Application filed June 3,

TofiZZ whom it may concern:

Be it known that I, PAUL K. JONES, a citizen ot the United States, residing at Clinton. in the county of Henry and 'State of Missouri, have :invented lcertain new and useful Improvements in Shock Absorbers, of which the following is a specification.

The invention relates to spring lsuspen-V sion in motor vehicles and especially that type in which an auxiliaryappliance is in-VV corporated to function between the ordinary spring and its perches. It also aims to eect improvements in lever elements pivoted upon the axle bearing at itsgouter end' uponv an Vintermediate -portion of the ordinary spring, and having the end of the ordinary springn resiliently supported bythe lever element. y y

It is a specific aim of my invention in such devices as indicated to attain an intermediate spring' suspension loperative between the auxiliary spring for absorbing extremely light shocks, and the regular spring adapted to functiony efficiently to neutralize tlie'efl'ect of `greatundulations in a roadway encountered by the vehicle.' lt is a further special aim to so construct such device as to reduce shock incident to lateral concussion upon the wheels of the vehicle. l A; further aim is to provide improvements at the saine time that 'the before mentioned desirable ends are attained without complication of the production of such an appliance. It is al'soan aim to venable the construction of such an appliance at a low expense.

Additional objects, advantages and features of invention will become apparentv in the construction, arrangement'and combination oi' parts involved, one embodiment of the invention being described hereinafter and shown. in the drawings,'wherein,

` Figure 1 is an elevational view of a rear axle assembly at one side,

Fig. 2 is asimilar view of the'front axle assembly, y f

Fig; 3 is a ldetail of the spring shackle, Fig. 4 is a detail top view of the auxiliary spring with parts removed, l

Fig. 5 is a fragmentary' cross section of the mounting of the spring lever thereon,

Fig. 6 is a cross sectional view of, the said mounting,

' Fig. v7 is I a fragmentary sectional view of thelmounting means and relation of 'the spring thereto.V i

There is illustrated apart ofthe running. gear ot a motor vehicle of a type very largelyV used atthe'present time, including a front axle 1 0, and a rear axle 11. `The'front axle 10 istitted with' a spring perch 12 which is ordinarily inclined inwardly from the upper side ot the. axle and connected to the ends ot the spring 13, by a spring shackle of 'clines outward'lv. Upon-,the perch .there is pivoted 'by the-(shackle bolt 14,'a base lever 15,'adapted to be drop-forged or cast, a'ord-V ing` a mounting fora lever spring 22 and coil spring 18 tobe described. The base member is formed with a circular enlargement ldrecessed on `its upper Vsideto afford a seat :for a lconicall coil spring 18, thesize of which is-pro'perly proportioned to then serv-l ice contemplated. centrally across .the recess 17, opening through aslot 20 in the `inner side of the basepiece 15, and an'extension 21is formed upon thel Aupper part of thebase, over the slot and extending inwardly from the basea distanc'e,'so asto bear upon the lever spring 22, which lisv inserted through the slot and ex'- tended across the recess in the channehsecuredatits extremity in the recessfby aboltl 23, as shown in Fig. 1, The springl is connectedby a shackle'bolt- 24 5to a hanger yoke 25 having a shank 26 extended slidably through apertures inthe base and thespring 22, as shown at 27, its upper end being provided with a 'collar 28 set upon the 'upper end of the spring 18. Thel openings at 27 Vin the base piece 15 are of' a size to limit ,movementof the shank 26 longitudinally of the axle'lO, land to preventfore and aft movement of the shank, insuch manner that the shankniay have a certain amount of oscillating movement in a'plane with the axle, resisted by the spring 18. Thejouter end of thejlev'er spring has secured thereon a saddle fitting 29 consisting of a body plate i 30 upon which the outer end of the "spring rests, securedthereto bya rivet or other fastening 31. The outerpart ofthey plate 30 is provided withdependent ears 32 arranged to engageupon the front and rear sides of the spring 13, and the plate is suitv ably slotted, as indicated at 33 to receive an erica.A

-PAUL K. Jones, on cinturon, Missoula.

A. channel 19 is' formedA the axle.

-a size to anti-friction roller 34 having trunnions engaged in slots 35 in the ears 32, whereby it is supported against loss or casual disengagement: The slots 33 and 35 are of permit proper movement of ythe roller 34V in bearingbetween the springs 13 and 22. rlChe spring 22 vmay be made of a number of leaves if desired, two being shown in the present instance, though the number maybe varied as2 found desirable.

The perch at the rear is constructed to provide a 'boxing 41 l(see Fig. 5) within which the pivotlug 42 of the base 15 may be inserted and pivoted upon the shackle bolt of the base. The forward base 15 is preferably provided with two ears 36 embracing the upper end 12 of the perch and-receiving the shackle bolt 14 therethrough. The construction cf the two devices may otherwise be the same, with' the exception that it may be found preferable temake one slightly heavi'er'than Vthe other. lln the present instance, the boxing 41 is formed with a top bar 44 extending` thereacross over ythe barrel element 45 of the lug 42, by Ywhich the base element of the rear auxiliary is pivoted upon The lug 43 is formed with \a lip 46, which Vextends vover the bar 44, and is arranged Ato bear thereupon when the base element 15 is at the upper limit of its movement.V The recess 47 formed under the lip 46 snugly receives the bar 44 of the perch, whereby the latter engaging in the recess vill also aid in stopping upward movement ofthe base member V15.

lf desired, the base elements for the front auxiliary may be provided with an exten-r sion 50, as shown in Fig. 7, formed with a cross bar 51 located so as to strike the outer side 'of the perch 12 when the member 13 is moved pivotally to the upper limit of its movement. f

In theoperation of the device, a sidethrust from the axle will cause the saddle elementy to slide inwardly this movement being gradually resistedby thespring 18, as soon as the sides of the openings 27 bear afrainst the shank 26. Light shocks and vibrations transmitted from the roadway to the kaxle will be absorbed by the spring 18 ordinarily, Awhich is so` constructed that its movement will have narrow limits, and when this spring 18 is compressed to its limit, the pressure` transmitted through the hanger will be sustained upon the base element and transmitted to the lever spring` 22. rllhis spring will be of considerably lighter construction'thanv the leaves of the regular spring A13, and will flex to a limited extent, but owing to the application of force close tothe fulcrumlrepresented by the shackle bolt 14, the pressure therein will be severe,

although, the action of the Spring will be such that the seeendary shocks occuring during' severe flexing,Y of the spring 13 will be absorbed and equalized.

ldlhen the spring 22 is flexed, and during such tlexure, the spring),` 13'will also function to an extent increasing proportionately as tlexure of the spring 22 progresses. ldhen, after severe tlexure of the spring; 13, the latter rebounds,r and a tendency to throw the bc-dy ot' the vehicle above its normal position occurs, with the construction of mounting in relation to the perch shown in Figures 5 and 7, the spring 22 will engage the intermediate part of the spring 13 and oppose upward movement hereof beyond the predete'l'ined ncrmal position at which this function shall end.

lt willbe readily understood that the foregcii cg device is adapted to be produced economically in accordance with well known -pted to be interchanged andinterposed between the ordinary shackle spring and perches of the ordinary vehicle, without requiring modilication of the axle or the ordinary spring lt will also be seen that a device functioning in'a novel way for the attainment of new ends in such device .is provided. that the parts are Vof such form as to lbe of Igreat durability and liable in a minimum degree to derangement. The parts will alsoA require a minimum of care for maintenance.

Vilhat is claimed is: Y

1n a device of thecharacter described, a perch, a lever pivoted thereon having an inu termcdiate circularly recessed enlargement having a channel longitudinally thereacross and slot through the outer side forming a continuation of the channel. a leat` spring forming` a continuation of the lever set in said channel' and projected through said slot dist-ance, said spring and lever having longitudinal slots formed therethrough centrally of the recess, means to secure the spring' in the lever. helical spring1 mounted concentric with Said recess, a bolt supported on the upper end of the spring and projected slidably through the slots, and having limited oscillation therein, and a main leaf Spring hun@u upon the lower end of the bolt, said tirst named spring` bearingl at its outer end upon an intermediate part of the last named spring.

ln testimony whereof l have atligred my signature in presence of two witnesses,

rant rr. Jones.

llllitnesses N. ABNEY, `W. idf. Hunt.

llO 

